Water evaporaiion losses from the soil surface constitute one of the inevitable inefficiencies of irrigation. Many types of soil coverings or mulches have been investigated for reducing evaporation losses. Studies have shown that a porous mulch can be made by cementing pea gravel with a small amount of fine sand and cement mortar to hold the gravel grains in a solid array without fill... https://homehardware4ues.shop/product-category/nozzles/